Car-wheel-grinding machine



(No Model.)

C. E. NORTON.

OAR WEEEL GRINDING MACHINE.

Patented Dec. 28,1897.'

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2a 23* 6. 3 2 if -1 ze'w'ea? [7502/ p7 I f V chi/6.512: ZZZ/ 227a NITETATES CHARLES E. NORTON, OF MANCHESTER, CONNECTICUT.

CAR-WHEEL-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 596,336, dated December28, 1897.

Application filed May 10, 1897. Serial No. 635,786. (No model.)

To ctZZ whom it may concern:

Be it known that 1, CHARLES E. NORTON, a citizen of the United States,residing at Manchester, in the county of Hartford and State ofConnecticut, have invented new and useful Improvements in Car -VVheel-Grinding Machines, of which the followingis a specification.

This invention relates to car-wheel, grinders, and more particularly toa machine of this class for grinding the wheels of electric cars, theobject of the invention being to provide a grinding-machine adapted togrind the wheels of cars without removing the axles from the trucks; andthe invention consists in the construction of the machine, ashereinafter described and claimed.

In the drawings forming part of this specification, Figure 1 is aperspective View of my improved grinding-machine, shown in operativerelation to the wheel of an electric car. Fig. 2 is a longitudinalsection through the base and bed-plate of the machine on line 2 2, Fig.1.

Referring to the drawings, A represents a portion of atruck of anelectric car; B, a por-' tion of the motor having the usual gearconnections to the axle C, on which the car-wheel C is secured. In Fig.1 these parts of the car are shown in position over a pit, such as isordinarily used in the repair-shops. to CL represent the rails on whichthe car rests, the truck being shown raised out of contact with saidrails by means of a jack-screw D. 2 represents a metal bed-plateextending over said rails a and having the downturned ends 3, in whichset-screws 4 are located, by means of which said bed-plate is secured tothe rails. A slot 5, T-shaped in cross-section, is located in saidbed-plate 2 and extends from end to end thereof.

6 represents the base of the grinding-machine, in which is a stud 7,projecting downwardly from the under side thereof and having a suitablehead thereon for engagement with said slot 5 in the bed-plate 2. Saidbase has a sliding movement lengthwise on said bed-plate 2 and isrotatable thereon on its said stud 7 to any desired degree. On the endof said base 6, lying over said bed-plate 2, two lugs 8 are cast,through which suitable set-screws may be screwed down into engagementwith the upper surface of the bedplate to lock said base 6 in anydesired position thereon. On said base 6 is aslideway 9, having undercutedges, with which the baseplate m of the motor M has a slidingengagement substantially at right angles to the axle C. Said slidingmovement is imparted to said base-plate and motor bya feed screw-rod 10,engaging with a stud 12 on the under side of said base-plate andprojecting downwardly therefrom into a suitable slot in the base 6between the sides of said slideway 9, one end of said screw beingrotatably secured in said base-plate and the opposite end thereofprovided with the hand-wheel 13.

On each side of the base 6, nearest to the axle C, are pivotally securedtwo arms 14 14. The opposite ends of said arms are provided withsuitably-hinged connections 15 15 for engagement with the axle C, saidarms being made each of two sections and united byturnbuckles 16,whereby the length of each may be increased or diminished, as desired.

On the base-plate m is secured the motor M. Said motor may be one of anyof the wellknown constructions, the armature 17 thereof being suitablysupported, as shown, whereby it may be given an endwise motion in itsbearings through the field-magnet, and for that purpose a grooved collar18 is fixed to the armature-shaft 17 a near each end thereof. Two lugs19, on opposite sides of the base 6, are provided, on which may bepivoted a lever 20, the forked end of which engages with said groovedcollar 18 for imparting to said armature-shaft 17 its endwise motion. Anemerywheel 21 is secured on the end of said armature-shaft 17, in theusual mannenbetween suitable flanges, a nut 22 screwing onto the end ofthe armature-shaft 17 to hold said emery-wheel in place. The groovedcollars 18 serve as a shoulder against which the inner flange of saidemery-wheel abuts when the nut 22 is screwed up to clamp said wheel tothe end of the armature-shaft. In this construction the commutator ofthe armature 17 is made of sufficient length to permit of the endwisemovement of said armature, as described. Suitable electric connectionsare made between the binding-posts 23 on the base-plate m with someconvenient source of electricity, and suitable connections between saidposts and the commutator-brushes are also provided, whereby saidarmature 17 is made to rotate at suitable speed.

The operation of my invention is as follows: The end of a car-truck inwhich the wheel 0 is located (the tread of which is to be ground) isfirst raised off of the rails a in any convene ieut manner. Thebed-plate 2 is then placed on the track substantially parallel with theaxle 3 and in such position as will bring the face of the grinding oremery wheel 21 in proximity to the tread of the car-wheel. The arms 14 1L are then connected to the axle, as described, and the bed-plate 2 issecured to the rails by turning up the set-screws 4. The armature-shaft17 is then brought into parallelism with the tread of the car-wheel bymeans of the turnbuckles 16 on the arms 14 and 14, and the base 6 isthen secured to the bed-plate by means of the set-screws in the lugs 8on said base. By manipulation of the feed screw-rod 10 in the base 6 thebase-plate m of the motor and all of the parts secured thereto may bemoved toward and from the axle O, and the grinding or emery wheel 21having been set in motion by switching the current into the motor M theoperator, by grasping the lever 20 and the feed screw-rod 10, may grindthe face of the tread of the car-wheel, as desired, the latter havingbeen set in motion at slow speed by its own motor and in a directioncontrary to the direction of the rotation of the grinding-wheel. Ifdesired, the arms 14 and 1% may be removed after the device has been setin proper position for grinding the tread of a wheel. Furthermore, insome cases only one of said arms may be required to make the necessaryadjustment or to act as an additional support 1 or maintaining theproper relative positions of the grinding mechanism and the car-wheelduring the operation of grinding.

Should it be desired to grind the wheel on the end opposite to thatshown in the draw ings, the base 6 is moved on the bed-plate 2 towardthe other of said wheels and the emery-wheel 21 placed on the oppositeend of the armature-shaft to that shown in the drawings and the lever 20removed to the opposite side of the base-plate m and connected with thecollar 18 on that side.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. A machine for grinding car-wheels and for analogous purposes,consisting of a bedplate, a base movable longitudinally, and rotatablethereon, a base-plate having an electric motor secured thereto, meansfor moving said plate transversely on said base, an armature-shaft forsaid motor which has an endwise movement in its bearings, agrindingwheel, means for securing said wheel to either end of saidshaft, and means on the latter for imparting thereto said eudwisemovement, substantially as described.

2. In combination with a suitable track and a car therefor, acar-wheel-grinding machine consisting of a bed-plate securedtransversely across said tracks, a base for said grindingmaehine movablelongitudinally, and rotatable on said bed-plate, means for securin gsaid base to the latter, an electric motor secured to a suitablebase-plate which plate has a sliding engagement on said base toward andfrom one of the axles of said car, an armature and shaft for said motorhaving a sliding endwise movement through the field-magnet, agrinding-wheel on one end of said armatureshaft, means for impartingsaid sliding movement to said shaft, and suitable electric connectionsbetween said motor and a source of electricity, and means for rotatingthe weeels of said car, substantially as described.

CHARLES E. NORTON. lVitnesses:

WM. II. CHAPIN, K. I. CLEMONS.

